I bought the V-band clamp from DMCH which has a part number that does not seem to be a standard part. I did some research on stock clamps and there are a lot of variables you can choose from.
I was ready to try the Breeze VT10469 but decided that DMCH must have done a lot of testing for the proper clamp. But after finding out your not going to get a clamp that will compress the pump down since the ridge on the tank is so little I think it's not that critical. So if your a gambling man, try that VT10469
https://www.ebay.com/itm/Breeze-VT10...frcectupt=true